The present application relates to the field of network communication technologies, and provides a packet processing method and device, an advertisement method and device, a bridge node, a source apparatus, a packet processing system, and a computer-readable storage medium. The packet processing method includes: receiving a time sensitive networking (TSN) service packet; querying, according to a packet header of the TSN service packet, a mapping table of service stream IDs and TSN-profiles, where the mapping table of service stream IDs and TSN-profiles is established according to advertisement information of a source apparatus; and processing the TSN service packet according to a result of the querying on the mapping table of service stream IDs and TSN-profiles.